package com.leo.foodmaster.commons.inteceptor;

import java.lang.reflect.Method;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.hutool.json.JSONUtil;
import com.leo.foodmaster.commons.annotation.RepeatSubmit;
import com.leo.foodmaster.commons.entity.Result;
import com.leo.foodmaster.commons.util.ServletUtils;
import org.springframework.lang.NonNull;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

/**
 * 防止重复提交拦截器
 *
 * @author ruoyi
 */
@Component
public abstract class RepeatSubmitInterceptor extends HandlerInterceptorAdapter {
    @Override
    public boolean preHandle(@NonNull HttpServletRequest request,
                             @NonNull HttpServletResponse response,
                             @NonNull Object handler) throws Exception {
        if (handler instanceof HandlerMethod) {
            HandlerMethod handlerMethod = (HandlerMethod) handler;
            Method method = handlerMethod.getMethod();
            RepeatSubmit annotation = method.getAnnotation(RepeatSubmit.class);
            if (annotation != null) {
                if (this.isRepeatSubmit(request)) {

                    ServletUtils.renderString(response, JSONUtil.toJsonStr(Result.fail("不允许重复提交，请稍后再试")));
                    return false;
                }
            }
            return true;
        }
        else {
            return super.preHandle(request, response, handler);
        }
    }

    /**
     * 验证是否重复提交由子类实现具体的防重复提交的规则
     *
     * @param request 请求
     * @return boolean
     */
    public abstract boolean isRepeatSubmit(HttpServletRequest request);
}
